What is the compression-to-ventilation ratio for adult CPR when there is one rescuer?

The correct compression-to-ventilation ratio for adult CPR when there is one rescuer is 30:2. This means that for every 30 chest compressions delivered, the rescuer should provide 2 breaths. This ratio is designed to maximize the effectiveness of compressions while ensuring adequate ventilation for the patient.

The 30:2 ratio is based on guidelines from the American Heart Association, which emphasize the importance of maintaining continuous compression to improve blood flow during cardiac arrest. By providing more compressions than breaths, the rescuer can help maintain circulation and oxygenation to vital organs until advanced care can be provided.

Other ratios mentioned, such as 15:2 or 10:1, are outdated or not recommended for adult resuscitation with one rescuer. The emphasis on the 30:2 ratio reflects research indicating that this approach increases the likelihood of positive outcomes in adult cardiac arrest situations.